God of the roster (4)
I believe the answer is:
eros
'god' is the definition.
(I know that Eros is Greek deity)
'of the roster' is the wordplay.
'of' indicates a hidden word.
'EROS' is hidden within 'the roster'.
(Other definitions for eros that I've seen before include "Sore about love god" , "Winged archer" , "Famous statue in Piccadilly, London" , "One worshipped" , "Arrow-shooting god" .)